Valve apparatus.



E, 'Pfl NOYES.

VALVE APPARATUS.

APPLwATIoN HLBD JULY 17, 1912.

ggsg Patented Aug. 2,913.

.MM XWW,

type of apparatus employing a single-seat- REV/ARD NOYES, 0F WNGHESTER,MASSACHUSETTS.

vai-iva application Inca .my i7', isis.

'Specification of Letters Eatent.

iJatente-d Aug. 5, g, serian ne. maeva f To all w/wm t may concern.:

Be it known that l, EDWARD P. Norris, a citizen' of the United lStates,residingat Winchester, in the county of Middlesex and State ofMassachusetts, have invented certain new and useful Improvements inValve Apparatus, of which the following is a specification.

This invention relates to valve devices employing a motor piston or,other Vseptum to operate the main' valve, and a pilot valve or valvesfor controlling the pressure upon and the movements of said piston andmain valve. y y

When the pilot valve or valves are under control of a septum responsiveto the ditference between they posterior pressure and a standardpressure such as atmosphere and a spring, the apparatus becomes areducing valve. Y

My object is to provide a simple and delicately-controllablevalve-apparatus which shall 4be substantially pressure-tight whenclosed.

In carrying out the invention I prefer the ing main valve which close-sWith theflow and is easily hert pressure-tight when closed, but haveobserved that Where the anterior or service-pipe pressure has freeaccess to one side of the motor piston, the extreme pressure-differences tend to produce excessive leali-age past the piston andalso make it difficult to maintain a close regulation of the posterior'pressure, especially when the latter is established at a small fractionoi' the anterior pressure. The use of only a single controlling chamberadjacent to a rela tively large diameter pistou is often -rtlier causeof poor regulative results. These objections may be overcome byemploying some or all of the features of the present invention. p

Of the accompanying drawings, lligure represents a longitudinal verticalsection, and Eig. 2A an end elevation partly in sectio'showig a reducingvalve apparatus constructed according to my invention.

' l0 1s a casinghavln-g admission and discharge chambers il, 12containing the anterior and posterior pressures respectively, anddivided by a fixed partition 13 having a port 16 controlled by the mainvalve 17. The latter is preferably a puppet-valve which seats'ivith theloiv Vas shown and is also preferably balanced or neutral to theanterior pressure, its stem 18 being of the same diameter as the valve.This stem has a sliding it in a fixed partition lQKand is connected atits upper end `vvith an operating piston 20 Working' in a cylinder 2l,there being a chamber 22 beloa7 said piston which term a valve-opening`chamber, and a chamber 23 above it which I term a valveclosing chamber.The valve stem is bored out centrally andslides on a xed cylindrical ortelescopic member 24 carried by a removable plate 25. 26 is a secondvalveclosing chamber whereby the main valve may be substantiallybalanced as to the posterior pressure, said chamber being formed in saidcylindrical valve stem 18, its lower part containing a light spring' 2Ewhich tends to seat the valve. The chamber 22, which, with its means ofpressure control, constitutes an important ire of my invention, issupplied by lealtagc from the yanterior chamber ll, for exple throughthe small duct 34 controlled by a aerea-valve 35, and it discharges intothe chamber valve stein, and an annular corrido-r 29, lateral passage 30and port 3l in the telescopic member 2l, this path of communication beil9, controlled by a small conical or puppet valve 32 on thelovver end ofa sliding' pilot valve member. Chamber 23 also derives its pressure by'leakage from the anterior side of the ma'n valve, in this caseindirectly through cham1 'oer 22 and past the piston 20, any suitablemeans for su plying anterior. pressure to either of the c iambers 22v@1923' may be employed. when.' caamber 23 is supplied' serially throughchamber 22 as shown, the valve closing pressure above piston Zlcannotrise' higher than the valve-openingx pressure belos'. it, and l thusavoid any tendeuovothe 26 through holes 28 in the main` -t is lobenoted'that member and in the main uaiu 'valfe to slam against its seatwhen the outlet from chamber 22 ia shut all.

The chamber is iu brauch eouueetiou with lille ehaluher Q23 through a,reS-lrieerl pa 3G iu the relezs-zupie member 24a and it has au outlet lothe posterior rhaiuher l2 l'hrougli a purl'y 3l' iu a parlilioa uuauherer tliiuilile 58 whirl; is aerewell iule the plaie u ehauilier Si)'formed iu aairl lhiuihle, au l a duet G iuruial parll).V iu plaie andpartly iu the maia easing', the vairl (aule heilig eoulrolled by a Smalleouieal or puppel 'Valve il ou the upper eurl el? he pile"k yalyemember'l'hia ralve il also uitiiuarely eo'ulrola the outlet 'from eliaruher22S, siaee the latter discharges iai/o 2l/3. The ri l relaeiou' al'the'se Chambers aiul l'lie Courrol of liheir outlet hy a single valve ismainly a mailer of CoureuieueeAn )ut has the aelvuuz of insuring' lessliability of leali age "when lhe main Yalre eluseffl aiul also permits asimple eonsliruetiou of the pilot meuiliier and ils related paris. lprefer ro also roul'rol or reslriel; the eouueeriug' passage lo hy apilot; yalveu auch aa the pistou portion 5T ou luea'ilier 33, althoughthe reslriererl paaaagge aluue would allow Sullieieutly grail ualfixhauees olf preasure in ehau'iher Si to avoid that eur'leney ol theiiiaiu 'Valve to open or clore all the way when faire started, whichwould arise if ehaiuhers 22:5 arul 2&3 were 'Freely open to each otherso as lo cuualilule yirl'ually one eliauilier.

fhe eouSlrueliou here represeueil. the y prepoiuleraure of area of ihepian, i '1 upper :airle over the area ol' its lower aille. me 1 aurea ortrials; lo produce Clown- 'wurrl pregare upur, sairl pislou when liu:presuree per erguare iueh iu ehauiheris aiul i are equal, but thiseoual'rueliou may he farierl. la ray prior Palmira Noa. (JSR-5:1,SlfllrQSl), aurl llfijl are set lorlh iuelhoela of ueulraliicirigr,oyeii'ialaiiraug or uurlerhalaurine pistou-valves of this generaleharawler.r which are applieahle hy iihe exer eise el' luerhauieal ahilllo alle present iureulieu.

",lhe plaie am laiuell hy a `fspaeer r i ou reuimiur wi'iirli heinferior parla he liSaaaeuililr-rl.

fleur lV whirh passera through the port Il? rouuerls ille pilol--i'alvemember wil'h a llezul or follower fli which is guided iu the lliiuilileClin' auel elevated hy a spring ll, lhe laller pressing the followerupwardly aeaiual a ilexihle diaphragm 45. Thaleruearli the diaphragm aLhamher Ll-h' eeu- 1 u all) and Screw cap 52, may

rliaphragnrifr are rouerliue ihrougjh a uur@ /17 Willi [he puaterior i.

rliauilier l2 uurl Said (liapliragiu 1.11 aerorfrliff'ljc e maire lo ilumale/rior pr ure. lha ifea opwaaiie .aule lliia diaphragm a: uz--ualSlauilarll irri sul/sull iu a zuuahlr having; a;

of a aprilie' meut. il-S) and aetiuje; eri aha diaphragm through afollower 50, and almosihe'rlc pressure iu lhe ehiuiher [il: '.lheeliauihers Elf) aud Lib eould he directly operi lo each other, aine-eholh eouaiu posterior pressure, hut iu errler lo `uurrl agaiual 'falseoperation ilue to hlewiugr olZ lhe lliseharge from port if' oue `thelower side elf lli-e clizuihragu'i, l prefer lo eoiiueeri theae lwochambers with the poslerior chamber lf2 hy iuea'us oilf VLhe Laeparale(lucia 56 aad flT.

3S a telltale rod pafsiug through ay williugghm: TrlA iu the lower Vwallor' the valve rasiugr auel adapted to eouueet with alle main valverl-.raugh a separahle serew coupling; 55, wherehy the u'iowiuents of theuiaiu raire may he iueliealzerl externally when desired aad said ralremay also loe operated manually.

Fig'. l Showg the lower pilot valve that rhe posterior pressure has;s'uilieieutly to eauae the complet, -.e.eseeut of diaphragm l5 aiulthatY the main. valve would he just eouuuei'uz'iug to open. Thelroppiuel ol the diaphragm has opeued the upper pilot valvey ll and hasreclueeel the pressure iu ehamhe 2G lo that of the pos terior ehauiliier1Q. The valve 5T hasl also opened passage 56. The uiaiu valve is thenheld against its Seat u'iaiuly hy its weight aiul the pressure of Spring20, for rho pressure in the 'alvewlosiugl eli-umher 2S is rapidly being(lissipaiell lhroiigh 'the small paaeage S6, aud the pressure iu chamberQ27 which luul been reduced to that of Jshe posrerior eliaiuher by theopeuiuf; o

uiaiu valve lf2 aud the D closed, which implies l valve il, is uowrising' because its outlet through the eliaiuher Q6 has been elofeefl bythe pilot valve 32 As this valve-opeuiug pressure Comes to exceed the'falling preaaure iu chamher 23 `the main valve opeuerl against gravityand the pressure of the Spring 27. The [low past said iuaia valverepleuishes the pressure iu the posterior Chamber l2, aud this heiuecommunicated to the charaber directly below the rliaij'il'u'aeiu if, thelatter rises. The first ellee'r is io lilow down the pressure in chamberQ2 iuro the lfeutral chamber '2G by the opening; of pilot valve 232, andas the diaphragm ricrea :farther the, pasaaee is closed aud their theoutlet `from chamber 26 lo the poserior eliamher is stopped by the(closure of the. upper pilol valve li. l`hereai'le all leakage past thepartition 1) will teun'l to spread itself through theehauihers abovesaid partition aS liar as ille valve lll, the pistou 2O becomessubstantially preaaure-halaueed aiul the rising pi'aaure iu rliauilier(3 cooperates with eji'ax'iry aml the spring' il? tu close the maiaYalve aiul `atupall further ou-l'low iuro the #uw aujual the latter haauul'il the pre ure in posterior eliauilier 1Q i l'alleu away alighr'ljf,

again prat 'fallen Al l() yvhereupon the above sequence of operations 1srepeated.

It will be noted that by this constructionthe Huid-pressure` dierencesacting upon the main valve piece are relatively small and yet prompt intheir operation, and the construction is such 'that the pilot-valvedevices may operate through a very small range of movement and serve toeffect a close regulation of the posterior pressure. The sliding fits ofthe' main valve and pist-on member may be fairly free in characterbecauseWhen the main valve is open and the pressuredifferences tend tocause leakage past said surfaces, such 'leakages, being 'relativelysmall in volume, do not adversely affect the operation of the apparatus.lVhen the upper pilot valve 4l is closed it is held to its seat by thepressure acting on the lower end of the member 33. The areas of thismember are preferably quite small and the stem 42 is of sti material,construction, and mounting so that its diameter' may be kept small. Bythis invention I am also enabled, if desired, to concentrate' all thefluid operating and control devices at one side of the main valve, Whilemaking 'this member of the single-seating, substantially balanced orbalanceable type, as shown in the illustration.

I claim,- v

1. In valve apparatus, the` combination of a casing having anterior andposterior chambers connected by a port, a main puppet valve controllingsaid port and adapted to close in the direction of How, a cylinder, apiston in said cylinder connected by a stem with said valve and havingvalve-opening and valve-closing chambers on its 'inner and outer sidesrespectively, supplied by leakage from said anterior chamber, and

valve means for controlling-the discharge from said cylinder chambers.

2. In valve apparatus, the combination of a casing having anterior andposterior chambers connected by a port, a cylinder on said easingseparated from the anterior chamber by a partition, a main valvecontrolling said port andhaving a stem lguided in said partition andanpiston in said cylinder with valve-opening and valve-closing chamberson opposite sides of it, said valveopening chamber being supplied byleakage from the anterior chamber, and pilot valve devices controllingthe discharge from' said valve-opening and valve-closing chambers.

In valve apparatus, the combination of a casing having anterior andposteriorcham` bers connected by a port, a main valve controlling saidport and having an operating. septum, valve-opening. and valve-closingchambers on opposite sides of said septum, a second valve-closingchamber, a restricted passage connecting the anterior chamber with thevalve-opening chamber, a restricted passage connecting the twovalve-closing chambers, and means for controlling the discharge oitpressure from said chambers.

4. In valve apparatus, the combination of a main valve 'having an'operating sep tum, valve-opening and valve-'closing chambers onopposite sides of said septum, a-sec ond valveclosing chamber on thesame side of the valve -as the aforesaid chambers, means for supplyingthrottled pressure to said chambers from the anterior side of the valve,and pilot-valve mechanism controlling the discharge from said chambers.

5. In valve apparatus, the combination of a casing having anterior andposterior cham'- bers connected by a port, a cylinder on said casing, amain Valve controlling said port,

a pist-on in said cylinder connected with the valve and having on oneside a valve-opening `chamber Which derives its pressure by leakage tromthe anterior side of said valve and on the other side a valveclosingchamber which derives its vpressure yby leakage from the valve-openingchamber, and pilotvalve mechanism controlling the discharge from saidvalve-opening and valve-closing chambers. y

6. In valve Yapparatus, the combination of a casing having anterior andposterior cham-- bers connected by a port, a cylinder on said casingseparated by a partition from said anterior chamber, a valve memberhaving a valve controlling said port, a hollow stem slidable in saidpartition and a piston in said cylinder' with valve-opening and valverclosing chambers on. opposite sidesthereof, said valve-opening` chamberhaving a restricted inlet from the' anterior chamber, a lixed membertelescoping in said hollow stem and forming with the valve member asecond valve-closing chamber, a passage connecting the two valve-closingcbambers,and pilot-.valve mechanism controlling' the discharge from saidvalve-opening andv Valveclosiug chambers.'

l7. In valve apparatus, the combination of .a casing'having anterior andposterior chambers connected b y a port, a main valve controlling saidport andhaving an operating septum,l valve-opening and valve-closingChambers on oppositesides of said sept-um,

'a 'second valvezclosing chamber connected with the 'first.valve-closingchamber, and a single -pilot-valve 'member .havingA pilotvalves controlling the discharge from Athe valve opening and the two-valve-closing chambers.

8. In valve apparatus, thecombination ot' amainvalve, a cylinder, apiston therein having a hollow stem extended through a bearing in thevvall of'said cylinder and connected with said main valve, a fixedmember' telcscoping in said hollow stem, and

League@ u@ u part removably mounted on said plate and having anotherpiloti-valve seat, a pilotvalve member mounted on said cylindricalmemberand having valves at its opposite ends coperatng with said seats, a capfor said plate, and av diaphragm interposed hetween said Cap and plateand seid pilot-valve member.

In. testimony whereof I have hereunto set my hund in the pesence oftwoeuhseribing l0 witnesses, this 12th day of July, 1912.

' EDY/@TARD P. NOYES.

Witnesses: Y

P. W7. PEZZETTI, G. L. JOHNSON.

concroL

